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Simptember 2025.

Day 7 - Mob wife.

Kirishima Miyama x fem!Reader

This story is a smut story for simptember, I’ll be writing more characters x reader one shots for simptember and if you want to see a character please let me know...

You must be 18 years or older to read this...

🔞⚠️NO MINORS ALLOWED⚠️🔞

Summary: from an arranged engagement to an actual meaningful relationship, and most likely not the most conventional couple but you work very well together. You finally show Miyama just how important he is to you.

Word count: 3.5k

CW: NSFW and adult content, yakuza!reader, mention of violence, guns and knife, swearing, slight public, groping, degradation, spitting, oral (f!giving and receiving), eating cum, footsie, switch!reader and Miyama, unprotected sex, overstimulation, multiple rounds.

You sat on the tatami mat lined floor with your sister siting next to you, your grandfather sitting before the both of you while he explained that one of you would be going to stay in Tokyo, because he was planning an engagement with one of his yakuza buddy’s, you frowned “and your shacking one of your granddaughters up with some yakuza thug, why?” You asked and the man laughed, while your sister shifted uncomfortably, “don’t worry the boy isn’t yakuza… he’s a good boy, smart and kind” he explained and you rolled your eyes, ‘yeah right’ you huffed as you thought before looking at your sister and grabbing her hand, your grandfather was just being an asshole, trying to scare Yoshino, he wasn’t planning on sending her that would go against the deal you had with the old man, “it’s alright, I’m the one who has to go…” you said and looked at the old man, “right?” You asked and he smiled and nodded, “I was just teasing you two, I know how much Yoshino loves it here in Osaka and how much you hate me, y/n” he laughed and you rolled your eyes again and scoffed.

That all happened several months ago and much has changed since then, this grandson of the old man’s buddy, Kirishima Miyama, wasn’t in fact kind and smart… well he was smart just chose not to act it all the time… but he was a sick twisted masochist who got off on making you furious with him, but somehow in this time away from home he managed to make you agree to be his girlfriend, and if you were being honest he was a really sweet and a good boyfriend, if not still pretty crazy. Though you couldn’t be totally faultless, you did try to shoot him, you’d managed to stab him twice, as well as giving him a few good beatings, which probably contributed to his feelings towards you, maybe you were just as bad as he was, because after this short time you’d found yourself feeling a type of way towards him, something more than distain or hatred, by not quite love… could you imagine loving that weirdo… actually you could in fact imagine loving Kirishima Miyama, could imagine starting a real relationship with him, starting a family with him after everything… though it was best to push all that away.

You stood in front of the mirror in your room and watched your reflection, you had recently found a dress your cousin bought for you, it was a lot tighter and shorter then something you’d normally wear, which explains why it was packed away, though you decided you’d wear it for your date with Miyama, you paired the dress with stockings and a pair of red bottom heel Miyama insisted on gifting you, they were far too expensive but you thought this would probably be your only chance to wear them, you admired your makeup and checked for any faults before grabbing your clutch and coat, you pulled your coat on and left your house locking up after, you walked to the car you were both taking to find Miyama already standing next to the car leaning against it looking at his hands, “I’m ready, you didn’t want long?” You asked and he looked up at you, Miyama smiled and walked over to you, he grabbed your hand and kissed them gently, “you look so even more gorgeous tonight” he hummed and you laughed, “I bet you tell all the girls that…” you smiled and moved towards the car, Miyama chuckled and opened the door for you before closing it and walking around the car, getting in himself.

The drive to the restaurant was mostly filled with meaningless chatter and that rolled into dinner, for the most part you were both happy to focus on eating, though there was still so light chatter. However despite the lack of conversation that didn’t stop you from making a move, you slipped off your heel and gently brushed your toes over his leg, gently slipping your feet under his pant leg briefly.

Miyama stiffened slightly and looked up at you, you smiled before pulling your foot back out of the leg of his pants before slowly trailing your foot up his leg over his inner thigh and pressing your toes against the tip of his cock, that was bulging against the fabric of his pants, Miyama grabbed the sides of the table and smiled brightly while looking at you, “I fucking love you…” he said so sincerely, you tried everything in your power not to believe it, in response to his words you slowly dragged your foot down his shaft before your toes hit the chair he was sitting on, when it did you move your toes close to him slipping them just slightly in between the chair and Miyama, before you gave his sack a light kick with your toes as you pull back and suddenly roughly pressed your foot back onto the tip of his cock, he gripped the table tightly and threw his head back, huffing in deeply as he did.

“What’s the matter Kirishima? Are you feeling unwell?” You question and begin rolling your foot over Miyama’s tip, he looked at you and smiled brightly, while still holding the table tightly, you picked up his glass of water and placed it close to him, “drink if you’re feeling unwell… don’t be stubborn” you hummed and began cutting a piece of your food before placing it in your mouth and watching Miyama as you chewed your food, you pressed your foot flat against his shaft and began rubbing your foot up and down, Miyama let go of the table and grabbing your ankle in one hand and his glass of water in the other, he pressed your foot further into his hard cock and rolled his hips every so slightly, all while he took large gulps of water, “very thirsty boy…” you hummed and flagged down a waiter.

The man arrived at your table and waited for one of you to speak, “we’ll have the cheque please, my boyfriend’s feeling unwell” you explained and the waiter smiled sadly, “of course ma’am is there anything we can do?” He asked and you shook your head, “no, he’s just stubborn and insisted on going out even though he was sick… it’s a good thing I booked our hotel close to the restaurant” you smiled brightly at the man and let your eyes shift to Miyama as he tightened his grip on your ankle, the waiter chuckled and nodded before leaving, “you’re going to pay the bill and then we’ll drive to the hotel I book for us, if you touch me before I’m lying down on that hotel bed, you can forget about finally having sex with me” you smiled and spoke so casually, the tone of your voice didn’t match your words at all, the waiter with the cheque and a little cough lozenge, you thanked the man as Miyama placed his card in the cheque book and you both watched the man leave again, you pointed to the cough lolly, “eat it, he was nice enough to get it specially for you” you explained and Miyama grabbed the sweet and had to let go of your ankle to open it, as soon as he let go of you, you removed your foot from him and slipped it back into your shoe, the waiter returned and passed Miyama his card and receipt to him, he smiled and nodded before standing and walking over to your side of the table, he offered his arm to you and you took it, you stood and you both walked to the front door, he passed the small number card to the woman at the desk, she read it and left, because returning with both your coats and your clutch, he grabbed them from her and helped you pull your coat on before handing you the clutch, he pulled on his own coat and ghosted his hand over your lower back, guiding you out to the car.

Miyama focused on the road as he drove and held the steering wheel so tightly his knuckles turned white, you smiled and rested your hand on his upper thighs, “Miyama, thank you for dinner, I’ll be sure to pay you back fully” you hummed and squeezed his thigh, you felt him speed up slightly and he shifted under your hand, “good” he growled coolly his cold eyes shifting you to for a moment, piercing into you, you shivered and your panties suddenly felt damp and uncomfortable, “you’re taking too long, I’m getting tired” you fact yawned and his eyes shot to you for a second before back to the road. You probably shouldn’t have been teasing him, but his reactions were just too cute, “are you asking me to pull the car over and fuck you in that seat” he grunted and you laughed running your hand up and over his bulge, you gave it a rough squeeze causing him to groan loudly, “that’d be difficult for you… I did say you weren’t to even touch me until I was lying on our hotel bed” you hummed and he shifted again as you let go of his cock, moving your hand back to his upper thigh.

You walk through the hotel foyer, reaching into your clutch to retrieve the room card, “we’re not checking in?” Miyama asked and you shook your head, holding up the card, “already did” you chuckled and he smiled following you into the elevator, you pressed the button for your floor number, you waited patiently not once looked at Miyama all while he glared you down, the elevator door opened on your floor and you grabbed a hold of his tie and pulled him along to the door of your room, he followed you, matching your steps perfectly.

You stood in front of a mirror with a dresser table in front of it, you slipped off your coat and tossed it to Miyama, “hang my coat up as well and then come help with my necklace” you hummed as you noticed him hanging up his coat and blazer jacket, you removed your earrings as he stepped up behind you, he stared you down through the mirror as he undid your necklace, and despite his gentle movements you could tell he was trying desperately not you wrap his hands around your neck and start choking you, “unzip my dress…” you hummed and he reached up, pulling your zipper down and unhooking the clasp on your dress, Miyama placed his hands on the dresser table on either side of you and he leant in you undid your hair and watched as he breathed in the scent of your hair, you turned to face him and reached for his tie, you undid it and placed it on the dresser before you reached up and began undoing his dress shirt buttons, once they were fully unbuttoned you pressed your hands to his chest and began pushing him back, until he fell back onto the bed, Miyama grabbed the bed sheets as he watched to walk back to the dresser were your clutch sat, you reached into it and grabbed out two square packets, before walking back to the bed, you slowly peeled the dress from your body, you ran your hands over your body, then you walked back to the bed and dropped the condoms off to the side, “I guessed the size based on your physique… so don’t you dare disappoint me” you smiled and he grinned looking at the condoms before looking back you, “you definitely won’t need to worry about that” he spoke and watched as you grabbed his belt, you moved quickly undoing Miyama’s belt and pants, you pulled his member out and he wasn’t kidding, you didn’t need to worry about him being too small, but now a new worry became your focus, though you simply pushed it aside.

You dipped your head down and licked up the length of Miyama’s cock, before gently sucking his tip, you pumped his length in long strokes as your hand squeezed him tightly, you gradually took more and more of him with each bob of your head, you lifted your head momentarily and looked at Miyama, “hands to yourself Kirishima, or I stop and you’ll have to use your grabby little hands to finish yourself off… or one of your whores can, I don’t care” you smiled sweetly and began sucking his tip again once this he grabbed tightly to the bed sheets again, you slowly took more of him, however he suddenly rutted his hips up as you began taking him deeper causing you to gag and pull back, you hissed and flicked his sack, Miyama groaned and looked at you with wide eyes, “don’t ever do that, Kirishima… you understand?” You hissed and Miyama didn’t answer, you frowned, you reached down and pinched his sack, he sucked in a sharp breath and his back arched, “say you understand” you growled and he nodded, you met his eyes and they were cold, holding that danger in them that at first made you fear him but now you found yourself enjoying it, you continued sucking him, taking him deep making you gag every so often, while you kept a hand resting on his sack while the other worked in time with your mouth, Miyama’s back arched and he moaned out as his cock twitch in your mouth, a hot salty liquid poured into your mouth, you pulled back and opened your mouth showing Miyama just how much mess he made, you quickly swallowed all his load before sitting back over his legs, “so quick… I shouldn’t be surprised that your premature with your age and all” you giggled and Miyama frowned, “I’m only a few months younger then you” he hissed and you smiled, “yeah but I think you like this teasing, your cock is still so hard… you really are a masochist” you hummed and you poked his tip, you grabbed one of the condoms and opened the package because pressing it over his tip before you looked at him and leant down, using your mouth and hand you slowly rolled the condom down his shaft, Miyama groaned and his eyes fluttered shut for a moment before he looked back at you.

You pulled back from Miyama and stood up off the bed before hooking your fingers into the waistband of your underwear and began pulling them down, you turned and bent over as your pulled your panties down your legs, letting them drop on the floor, you stepped your heeled feet out of them and turned back around and climbed back onto Miyama, you slowly lowered yourself down onto him and moaned louder as your walls stretch over him, Miyama groaned and made a move to grab you, however you shook your head and grabbed his hands, “I said not to touch me until I’m lying in the bed, be a good boy Kirishima” you hummed and began grinding your hips on him, his cock twitched wildly as you squeeze him tightly, you leant down and kissed his neck before kissing down his chest, you moaned and rolled your hip quicker, “I’m so close Kirishima” you moaned throwing your head back and gripping his hands tighter, “god yes” Miyama groaned and rutted his hips up into you, suddenly your orgasm hit you and you whined cumming on his cock, you pulled back and look down at the mess you left on his cock, you moved down and sucked Miyama clean before moving back on top of him, you held his mouth open and spat into it, he greedily and shamelessly swallowed and groaned at your flavour, “I’ve tasted many women but never have they complained to you” he moaned and you laughed.

You grabbed Miyama’s hand and pulled him as you laid back, “oh yeah, taste me later… I need you to finish what I started” you moaned as he leaned over you, you reached down to guide his cock into you however he stoped you, “it’s my time to be in charge” he hummed and grabbed your legs lifting them, he rested them over his shoulders and slowly spilled into you, you moaned and watched Miyama as he ran one of his hands from your ankle down to the back of your knee gently tracing his fingers along your nylon stocking, he repeated this action on the other leg before pressing them down against the bed on either side of you, opening your leg impossibly wide for him, Miyama leaned back and thrusted his hips quickly, watching your delicate walls wrap tightly around him, “fuck… I’m so ready to bust” he growled and leaned down to your neck, he kissed and bit your skin as he continued taking you, “I could spend all day and night fucking you, if only you weren’t so good I’m cum so quickly” Miyama moaned and continued kissing down your chest, before suckling on your nipple and you whined before running your fingers into his hair, “sucking my breasts like a baby, you’re starting to make me think I was right about you premature” you chuckled and Miyama growled, before glaring at you with that cold stare and shifting to bite the side of your breast, you sobbed out and felt your toes curl as you began cumming again, you squeeze Miyama tightly and his hip faulted as he let go of your legs and held your hips as he began to cum, “fuck fuck… take my cum baby girl” he huffed and slowly pulled out of you, Miyama quickly pulled the condom off and tied it off before tossing it on the ground, Miyama grabbed your waist and flipped you onto your hands and knees, before he shifted back and leant down, grabbing the back of your thighs and ass as he moved in and kissed your already abused opening, you moaned and gripped the sheets tightly.

Miyama chuckled as he felt your hand rest on the back of his head, holding him in place as you ground back on his tongue, “oh fuck, oh god… Kirishima” you moaned feeling the slight shake in your legs, he groaned and continued licking you, revealing in you intoxicating flavour, he lapped up all the wetness dripping from you, you began to feel yourself come undone again, your hips shook and you rolled back into him more frequently before your body went limp, “you’re better then I imagined, your gonna take my cock again right?” He hummed and you nodded looking back as you leaned up on your hands and knees, you watched Miyama as he finished rolling the second condom on on himself, he hummed and moved in closer to you as he held your hip.

You pressed your chest down onto the bed and pressed your ass up and against Miyama, he whistled as he slammed into you and held himself there, you cried out and grabbed the bedding tightly, “it’s almost too much for me” he groaned and began thrusting into you quickly, you revealed in the feeling of his thickness and how it dragged deliciously against your walls.

It had been hours and Miyama had long discarded the second condom, however that never stops him from continuing to fuck you, he had you in all kinds of positions, some you had never heard of before let alone tried out with other partners in the past, however now you laid on your side one leg draped over Miyama’s shoulder as the other rested on the bed he held your leg and rolled his hip up into your rhythmically, you tickled your finger nails down his stomach, you hummed softly and dug your fingers into the trimmed carpet of pubes, you felt him twitch and throb, he came again however just as you were about to asked him, he leaned in and rested his cheek of your breast, as he moved his hand to your other breast he spoke, “I have to stop, I’m shooting blanks… I’m sorry baby, you made me cum to many times” Miyama hummed and you laughed as you rubbed your hands over his back, “help me clean up Kirishima, my legs hurt…” you sighed and he nodded before lifting you out of the bed, holding you close and tenderly brushing your hair with his fingers, while he walked you to the bathroom.

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